JPS5463621A - Crt display system - Google Patents
Crt display systemInfo
- Publication number
- JPS5463621A JPS5463621A JP12989377A JP12989377A JPS5463621A JP S5463621 A JPS5463621 A JP S5463621A JP 12989377 A JP12989377 A JP 12989377A JP 12989377 A JP12989377 A JP 12989377A JP S5463621 A JPS5463621 A JP S5463621A
- Authority
- JP
- Japan
- Prior art keywords
- numbered
- signals
- character
- pattern information
- odd
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To make it possible to update character and pattern information without influences on a display screen by providing refresh memories for character and pattern information respectively.
CONSTITUTION: Refresh memory 12 to store character informaion, refresh memory 13 to store pattern information, timing circuit 22 to generate horizontal synchronizing signals, vertical synchronizing signals and signals indicating that odd-numbered and even-numbered vertical synchronizing signals are being generated, gate 18 to cause one memory output to pass synchronously with odd-numbered and even- numbered signals from circuit 22, and data resister 19 to store display contents of the memory which are outputted from gate 18 are provided. Then, stored information in register 19 is displayed on 25, and character and pattern information are rewritten individually, and the rewrite is performed synchronously with odd- numbered and even-numbered signals from circuit 22 when each information is not displayed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12989377A JPS5463621A (en) | 1977-10-29 | 1977-10-29 | Crt display system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12989377A JPS5463621A (en) | 1977-10-29 | 1977-10-29 | Crt display system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5463621A true JPS5463621A (en) | 1979-05-22 |
Family
ID=15020956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12989377A Pending JPS5463621A (en) | 1977-10-29 | 1977-10-29 | Crt display system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5463621A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57180963U (en) * | 1981-05-12 | 1982-11-16 | ||
JPS6063590A (en) * | 1983-09-17 | 1985-04-11 | 安藤電気株式会社 | Graphic pattern generator |
-
1977
- 1977-10-29 JP JP12989377A patent/JPS5463621A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57180963U (en) * | 1981-05-12 | 1982-11-16 | ||
JPS6063590A (en) * | 1983-09-17 | 1985-04-11 | 安藤電気株式会社 | Graphic pattern generator |
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